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Diffstat (limited to 'icmp.h')
| -rw-r--r-- | icmp.h | 45 |
1 files changed, 45 insertions, 0 deletions
@@ -0,0 +1,45 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * icmp.c - convenience functions for translating ICMP and ICMPv6 packets. + */ + +#ifndef __ICMP_H__ +#define __ICMP_H__ + +#include <stdint.h> + +// Guesses the number of hops a received packet has traversed based on its TTL. +uint8_t icmp_guess_ttl(uint8_t ttl); + +// Determines whether an ICMP type is an error message. +int is_icmp_error(uint8_t type); + +// Determines whether an ICMPv6 type is an error message. +int is_icmp6_error(uint8_t type); + +// Maps ICMP types to ICMPv6 types. Partial implementation of RFC 6145, section 4.2. +uint8_t icmp_to_icmp6_type(uint8_t type, uint8_t code); + +// Maps ICMP codes to ICMPv6 codes. Partial implementation of RFC 6145, section 4.2. +uint8_t icmp_to_icmp6_code(uint8_t type, uint8_t code); + +// Maps ICMPv6 types to ICMP types. Partial implementation of RFC 6145, section 5.2. +uint8_t icmp6_to_icmp_type(uint8_t type, uint8_t code); + +// Maps ICMPv6 codes to ICMP codes. Partial implementation of RFC 6145, section 5.2. +uint8_t icmp6_to_icmp_code(uint8_t type, uint8_t code); + +#endif /* __ICMP_H__ */ |